Some details are starting to emerge about the two Hoth Ultimate Battle Packs. According to YAKFACE the lineup for the two sets is as follows:Battle of Hoth (2 Battle Packs)1x Attack on Hoth with 1 AT-ST, 1 AT-ST Driver, 1 Snowtrooper1x Defense on Hoth with 1 Laser Turret*, 2 Rebel Soldiers

As with most rumors, this needs to be taken with a grain of salt until there is some sort of confirmation.